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The escape velocity from the earth is ab...

The escape velocity from the earth is about `11 kms^(-1)` .The escape velocity from a planet having twice the radius and the same mean density as the earth is

A

`"22 km s"^(-1)`

B

`"11 km s"^(-1)`

C

`"5.5 km s"^(-1)`

D

`"15.5 km s"^(-1)`

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The correct Answer is:
A
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